Fan attachment for sewing-machines.



E. M. TRUMAN.

FAN ATTACHMENT FOR SEWING. MACHINES. APPLICATION FILED JULY 20, 1915.

' Patented Apr. 18, 1916.

2 SHEETS-SHEET I.

, Tm: COLUMBIA PLANOGRAPH c0., WASHINGTON, D. c

E. M. TRUMAN.

FAN ATTACHMENT FOR SEWING MACHINES. APPLICATlON FILED JULY 20, 1915. 1 ,179,874, Patented Apr.' 18, 1916.

2 SHEETS-SHEET 2- UNITED STATES PATENT oFFicn.

ETHEL M. TRUMAN, OF VANCOUVER, WASHINGTON.

FAN ATTACHMENT FOR SEWING-MACHINES.

To all whom it may concern Be it known that I, ETHEL M..TRUMAN, a citizen of the United States, residing at Vancouver, in the county of Clarke and State of Washington, have invented a new and useful Fan Attachment for Sewing- Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved fan attachment for sewing machines, and an object of the invention is to provide an improved fan adapted to be clamped to the fly wheel of a sewing machine, whereby, as the machine is in operation, a steady draft of air will be generated, for keeping the operator cool.

One of the objects of the invention is to provide means for tightening the clamping arms in engagement with the fly wheel.

In practical fields the details of construction may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings: Figure 1 is a view in side elevation of a portion of a sewing machine head, illustrating the fan attachment as applied to the fly wheel of the head. Fig. 2 is a sectional view. Fig. 3 is a view in elevation of the fly wheel showing the fan removed. Fig. 4 is a disassembled view showing the connecting parts of the fan to the supporting holder. Fig. 5 is a view in side elevation showing the means for adjusting or tightening the clamps. Fig. 6 is a sectional view through the construction shown in Fig. 5. Fig. 7 is a sectional view of Fig. 6. Fig. 8 is a view showing the connecting parts of the fan to the holder disassembled.

Referring to the drawings, 1 designates the sewing machine head, in which the usual driven shaft 2 is mounted for operating the needle bar and the like (not shown), and on this shaft on one end is the usual fly wheel 3 having a pulley 1, with which the belt 5 engages. A supporting or fan holding frame 6 is provided, which is provided with the short transverse portion 7 from which the diverging arms 8 extend. The end portions of the arms are supplied with substantially semi-circular fly wheel engag- Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed uly 20, 1915. Serial No. 40,880.

ing parts 9. In applying the frame 6, the arms are bent toward each other, so that the parts 9 will extend within the rim of the fly wheel, after which the arms are allowed to spring outwardly causing the parts 9 to frictionally clamp against the fly wheel. The supporting frame or bracket is designed to be constructed of heavy steel spring metal, so that the parts 9 will bear against the periphery of the fly wheel with considerable force. The short transverse portion 7 has a rectangular opening 10, to receive the correspondingly shaped portions 11 of the screw member 12. The rectangular portion 11 also engages the rectangular opening 13 of the center of the fan 14, so that the fan will rotate with the screw and the supporting frame or bracket 6. The threaded end of the screw receives the thumb nut 15, to clamp the fan securely in position and against the short transverse portion 7 of the frame or bracket. In Figs. 5, 6 and 7, the clamping parts 9 engage the periphery of the fly wheel 3, in such wise as shown, that a tightening device 16 may be employed as shown, to hold the supporting frame or bracket firmly to the fly wheel. This tightening device comprises a turn buckle 17, which has right and left threaded connections with the short rod 18 and 19, arranged axially with each other and with the shaft 2 and screw 12. One end of the short rod 19 is conical and engages a correspondingly shaped depression 20 to one end of the shaft 2. One end of the short rod 18 has a conical portion engaging a cone spondingly shaped depression 21 in the head of the screw 12. It is to be observed that by turning the turn buckle 17 in one direction, the supporting frame or bracket is forced outwardly axially from the shaft 2, thereby clamping the bracket or frame securely to the fly wheel, which when rotated, the fan revolves therewith, thereby generating sufficient air to keep the operator cool.

The invention having been set forth, what is claimed as new and useful is 1. A fan attachment for sewing machines comprising a supporting bracket consisting of a short transverse part at one end formed from a single strip of stout spring steel and having stout spring steel diverging arms terminating in curved clamping parts to clamp against the periphery of the fly wheel of the machine, said short transverse part of the bracket having a rectangular opening, a fan having a central rectangular opening registering with the opening of the short part, a screw extending through said opening and having a rectangular portion to engage said opening, whereby the fan and the bracket will rotate as one body of the fly wheel, and means on the screw for clamping the fan in position, and means for forcing the bracket outwardly and axially with the center of the fly wheel to firmly clamp the bracket in place.

2. A fan attachment for sewing machines comprising a supporting bracket consisting of a short transverse part and formed from a single strip of stout steel, and having stout spring steel diverging arms terminating in curved clamping parts to clamp against the periphery of the fly wheel of the sewingmachine, a fan means including a screw to secure the fan revolubly with the bracket, a pair of axially alined rods, one outer end of one rod having'a thrust bearing in the screw of the fan securing means,

one end of the other rod having a thrust two subscribing witnesses.

ETHEL M. TRUMAN. Witnesses:

G. M. DAvIsoN, F. H. RAFFERTY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

